From 5fdca4a995bcd4cf61bda40af154a730589dc524 Mon Sep 17 00:00:00 2001
From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Date: Wed, 25 Jan 2023 18:19:00 +0300
Subject: [PATCH] dmaengine: dw-edma: Fix readq_ch() return value truncation
Git-commit: 5fdca4a995bcd4cf61bda40af154a730589dc524
Patch-mainline: v6.3-rc1
References: git-fixes

Previously, readq_ch() did a 64-bit readq(), but truncated the result by
storing it in the u32 "value".  Change "value" to u64 to avoid the
truncation.

Note: the method is currently unused, so the bug hasn't caused any problem
so far.

Fixes: 04e0a39fc10f ("dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures")
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/dma/dw-edma/dw-edma-v0-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/dw-edma/dw-edma-v0-core.c
+++ b/drivers/dma/dw-edma/dw-edma-v0-core.c
@@ -192,7 +192,7 @@ static inline void writeq_ch(struct dw_e
 static inline u64 readq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
 			   const void __iomem *addr)
 {
-	u32 value;
+	u64 value;
 
 	if (dw->mf == EDMA_MF_EDMA_LEGACY) {
 		u32 viewport_sel;